Noticed that the passenger side headlight housing has a lot of moisture droplets on the inside of the lens. 2003 Deville. I'll post a pic tomorrow morning. Thanks

well its cause ther eis air amnd moisture getting in there...obviously a leak in the seal...take the lamp out heat up the seal and pry apart....clean edges and make sure there is absolutely no adhesive left then reseal.....

Or, the bulb socket gasket is messed up.

I like Jimd's idea, its sounds like an easy fix, hehe

Most likely there is a bad lens seal. Clear silicone caulk works wonders.